I already have a line of three playthroughs planned out, so RP'ing those is going to help me pace my playthroughs and keep myself consistent. To wit:
First playthrough: Curious Mage who wants to see everything he can in the world, wants to make as many allies as he can, an idealist who's probably more trusting than he should be. This playthrough will be slower, both because I'll want to drink the game in and because my Inquisitor will be curious, unsure, and inexperienced.
Second playthrough: more worldly Dalish Mage, who will prioritize certain things, to reflect my expanded game knowledge. That will probably make my playstyle more economic, targeted thorough, and exacting
Third playthrough: nigh-omniscient Qunari mage who will conquer the planet with nary a misstep. As close to a speed-run efficiency playthrough as I'll ever get in a Bioware game, just to see if I've learned anything over two runs
So if each run is as different from the others as I think it will be, that should keep all of them fresh in their own way. But if left to my own devices, I tend to be like TDKR and scour obsessively for loot and junk to sell for gold.